Incandescent gas-lamp.



; WHY/588585, i

0. A; CAMPBELL.

INCANDESGENT GAS LAMP. APPLIOATION FILED AUG. 24, 1907.

PATENTED DEC. 3, 1907.

2 SHEETS-SHEET 1- /NV 70/? a. M

No. 872,895. PATENTED DEC. 3, 1907.

G. A. CAMPBELL. INGANDESCENT GAS LAMP.

APPLICATION FILED AUG. 24, 1907.

2 SHEETSSHEET 2.

' ATTORNEY fication, suc

CHARLES A. CAMPBELL, OF NEW YORK, N. Y

INCANDESGENT GAS-LAMP.

Specification of Letters Patent.

Patented Dec. 3, 1997.

Application filed August 24:. 1907. Serial No. 389.985.

To all whom it may concern:

Be it known that 1, CHARLES A. CAMP- BELL, of the city of New York, borough of Brooklyn, and State of New York, have invented certain new and useful Improvements in Incandescent Gas-Lamps, of which.

the followin is afull, clear, and exact speci- E as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to that type of incandescent gas lamps known commercially as arclights which are usually constructed in large sizes with metal intensifiers or stacks and used for illuminating stores and other public places. i

The object of my invention is to secure a strong and serviceable lamp which may be manufactured at an expense sufficiently low to enable it to be placed on the market at a low price. I attain this end by peculiar features of construction concerning the frame parts and the combination of the chimney shade and gas tubes therewith.

It is also an object of the invention to improve the construction of the pilot light device and its arrangement with the chimney and intensifierso as to reduce the liability to breakage and accidental extinguishment.

It is also an object of my invention so to organize the parts as to enable me to assemble' the lamp in single or multiple units at will making either a single or cluster light as desired and also readily to convert the lamp into an exposed or globe-inclosed light as desired.

In this manner, by' simple devices and operations, I provide a lamp which may be readily adapted to the various requirements of the trade.

The invention involves other features of importance and all will be fully set forth hereinafter and particularly pointed out in the claims.

Reference is had to the accompanying drawings, which illustrate, as examples, two embodiments of my invention, in which drawings,

Figure 1 is an elevation of the lamp with parts in section, showing it assembled with a single burner; Fig. 2 is a similar view showing the lamp assembled with two burners and an inclosing globe; Fig. 3 is a sectional plan on the line 33 of Fig. 1.; Fi 4 is a sectionalplan on the line 1-4. 0 Fig. 1; and

5 is a detail section of the pilot light devlce.

Referring particularly to Fig.1, 10 indicates'the gas supply pipe which supports the upper shade 11, and from which two gas pipes 12 and 12 branch. These pipes extend downward to a union 14 containing a valve 15 and sustaining the burner proper 16. -Of the tubes 12 and l2" the former leads the gas to the valve 15 while the latter is stopped off, in the adjustment shown in Fig. 1, from the gas and serves simply to assist in sustaining the various partsof the lamp. Surmounting the burner 16 is a glass chimney 17 with a reduced upper end 17 This end 17 is received within the lov. er end of-the metal intensifier tube 18 which extends upward between the tubes 12 and 12 to a point near their upper ends and is covered by the usual cap 19. This tube 18 is held in position and the entire structure braced by two brackets. Ofthese brackets theupper (see Fig. 3) is composed of two duplicate members 20, each having a semicircular middle portion with radially disposed arms at its ends. The semi-circular middle portions of the bracket sections match to embrace the tube 18 and the bracket is firmly yet adjustably fastened to the tube bya screw 21 or other fastening. The arms of the bracket sections op ose each other in pairs and receive the tu bes 12 and 12* between them. These arms are pressed against the tubes by screws 22 ,orother fastenings. It will thus be seen that the arms of the bracket sections clamp the tubes 12 and 12" while attachment of the bracket to the tube 18 is by means of direct contact of the screw 21 therewith. This secures firm and easy adjustment of the parts and avoids the expense of accurately constructed parts.

The lower bracket (see Fig. 4) is composed of two sections 20 similar to the sections 20 and having screws 21 and 22 similar to the parts 21 and 22 before described. From each of the bracket sections 2O radial arms 23 extenddownward and ward and are fastened by screws 24 or u like to an ornamental shade crown 25. These screws 24 serve also to support the shade 29 by engagement with the, usual flanged top thereof.

Adjacent to the lower end of thetu'be' 18, the tube 12 has brazed, screwed'orotherwise fastened thereto, ayalve nipple 30 (see particularly Fig. 5) which communicates with the tube 12 and has a plug valve or cook 26 by "which the gas movement through the nipple may" be controlled with ease and ac- Y curacy. Rising from the nipple is a tube that the instant gas is turned on at the which extends horizontally through 27 and over this is snugly yet removably ing description the lamp is susceptible to ready adjustment suiting it to the many varying conditions to be met with in the trade to which it relates.

emcee vertical arm of an elbow tube 28 Having thus described the invention, what a slot 18 'in the lower end of the tube 18. In the operation of the burner a small quantity of gaspasses from the tube 28 and burns continually over the mantle of the burner so burner the same is automatically lighted.

ily arranging the pilot light at the end ofthe tube 18 the pilot light is protected by the shade 29'fromdrafts tending to extinguislrthculight and the shade may be raised or lowered at will to adjust the reflection ofthe light and the degree to which the pilot light is inclosed. I

In assembling thelamp as a plural burner device, theintensifieris formed in two sectiolis"18 and "1-8" of which the upper 18 is of sheet metal tubing and thelower 18 of cast metal in the formpf an inverted Y, for a double lamp and an nverted double Y for a. quadruple lamp. The upper end of the section 18. isf'received snugly within the lower end bf the section 18 andthe reduced upper'endsof the chimneys 17 arereceived respectively within the lower ends of the branches of ,the section 18; The, pilot light devices aref'carried respectively bythe tubes 12 and 12 and for this purpose the ceive the pilot light devices as before demovable safety knob 32.

tends from a point Within the shade 29 downward to the bases'of the burner.- This globe 33 is removably sustained by a band 3 fastened to its lower edge and having legs 35 joined at their lower ends to a collar 36 which {its removably on the stud 31 and is held in place by a screw 37. To fit the globe 33 it is necessary to remove the knob 32 and replace the same after the collar 36 is secured. The knob then serves as a safety device to ,pre-

vent'the globe from fallingshould the screw.

37 give way.

,. The construction and arrangement set forth produces a strong and serviceable lamp all of the parts of which may be cheaply con-e structed in dies and similar labor saving machines. By avoiding the necessity of accurately'constructingthe several parts the-exense of manufacture is greatly reduced and y my improvements good v results are se-" cured without'ext'remc accuracy of construc-.

tion. And as will appearfrom the afore'gos I claim as new and desire to secure by Letters Patent of the United States is 1. An incandescent gas lamp having a burner, a glass chimney, a metal intensifier tube the lower end of which is engaged with the upper end of the chimney, side tubes extending down the sides of the chimney and intensifier, an upper bracket fastening the intensifier and side tubes, a bottom br cket also fastening the intensifier and side ubes, means 'projecting from the bottom bracket to sustain a shade, and a pilot light device carried by and communicating with one of the side tubes and extendin ing in the lower portion of the intensifier;

2. 'An' incandescent gas lamphaving side tubes, an intensifier. tube between them,,a

gaging the intensifientube ,tofifasten the bracket to the sidetubesi- 3. An incandescent gas lamp having side ,bracket loosely inclosing the intensifierfa fastening connected with the 'bracket-andem bracket to the side tubes and arms depending from the bracket to sustain the shade.-

- 4 An-incandescent gasflamp having side tubes, .an' intensifiertube between them, a

bracket inclosing the intensifier, a fastening connected with the bracket and engaging the intensifier tube to fasten the bracket thereto,

tubes, arms depending from the bracket, a shade crown and fastenings serving to secure both the shade crown and shadeto said arms. 5. An incandescent gas lamp having side bracket composed of duplicate members each having a semi-circular portion andprojecting embracing the intensifier tube and t e arms en aging the side tubes in pairs, means for ho ding the bracket members together and for clamping the said arms against the side in the semi-circular portions of the bracket members.

for holding t bracket members together and for clamping said arms against the through an open- 85 bracket loosely inclosing the intensifier, a' fastening connected with the bracket and en- .90 bracketthereto and means-for clamping the aging the.- intensifier tube to fasten the I y racket thereto, means for. clamping the tube 12 is opened, to the flow of gas. The 35 lower ends of the branches of the section 189 I .jo'f theiintensifier are orificed at18 'to re arms at its ends, the semi-circular ortions tubes, an intensifier tube between them, a

.165 means for clamping the bracket to the side .116 tubes, an-intensifier' tube between them, a

tubes, and means for clamping the intensifier I c 6. An incandescent gas lamphaving side' e se'mi-circu ar -portrons embracing the intensifier tubeand the r side tubes, means for clamping the intensifier in the semi-circular ortions of the bracket members and depend ing arms'carried by the semi-circular portions of the bracket members to sustain the shade.

7. An incandescent gas glass chimney an intensifier tube above the same, the end of one of said parts engaging the other and the intensifier having a slot in the lower end, a side tube, and a pilot light device carried thereby and projecting through the slot in the intensifier.

8/ An incandescent gas lamp having a glass. chimney an intensifier tube above the same, the end of one of said parts inclosing the other, and the intensifier the lower end, a side tube, a pilot light device carried thereby and projecting through the slot in the intensifier, the pilot light device consisting of a valve, a tube projecting therefrom and an elbow tube loosely connected to 'the first tube.

9. An incandescent gas lamp having side tubes, an intensifier the lower part of which is branched, a bracket loosely inclosing the upper portion of the intensifier, a fastening connected with the bracket and engaging the intensifier .to' fasten the bracket thereto, means for clamping the bracket to the side tubes, a plurality o burners sustained below the intensifier, and burner chimneys respectively engaged at their upper ends with the lower ends of the branches of the intensifier. 10. An incandescent gas lamp having side tubes, an intensifier the lower part of which is branched, a bracket looselyinclosing the upper-portion of the intensi er, a fastening connected with the bracket and engaging the intensifier to fasten the bracket thereto, means for clampin the bracket to the side tubes, a plurality 0% burners sustained below the intensifier and burner chimneys respectively engaged at their upper ends with the lower ends of the branches of the intensifier, the intensifier being constructed in two seclamp having a burner sustained having a slot in side tn tions of which the u per is a single tube and the lower formed wit the aforesaid branches.

11. An incandescent gas burner having side tubes, an intensifier, means fastening it between the side tubes, a burner sustained below the intensifier, a shade sustained above the burner, a stud below the burner a globe adapted to inclose, the burner and means for mounting-the shade removably on the stud.-

12. An incandescent as' burner having side tubes meeting at t eir lower ends, a by the lower ends of. the tubes, a shade sustained above the burner, a stud de ending from the meeting ends of the side tu es, a globe adapted to inclose the burner below the shade and means for removably mounting the globe on the stud.

13. An incandescent gas burner having side tubes meeting at their lower ends, a burner sustained by'the lower ends of the tubes, a shadesustained above the burner,- a. stud de ending from the meeting ends of the side tu es, a globe adapted to-inclose the: burner below the shade, means for removably mounting the globe on the stud, comprising a band secured to the globe, legs depending from the band and a collar connected to the legs and removably secured to the stud.

14. An incandescent side tubesmeeting at ieir lower ends, a burner sustained by. the lower ends of the tubes, a shade sustained above the burner, a stud de ending from the meeting ends of the iies, a globe adapted to inclose the burner below the shade, means for removably mounting the globe on the stud, and a removable safety knob on the end. of the. stud for the purpose specified.

CHARLES A. CAMPBELL. Witnesses:

Isaac B. OWENS,

MAHLON A. FREEMAN.

gas burner having t. 

